Robert renton gibbs



No. 62|,999. Phtented Mar. 28, I899. B. n. mass.

HOT WATER GIBGULATING APPARATUS.

(Application filed Apr. 18, 1898.)

llNrrn STATES PATENT Fries.

ROBERT BENTON GIBBS, OF LIVERPOOL, ENGLAND.

HOT-WATER-CIRCULATING APPARATUS.

SPECIFICATION forming part of Letters Patent NO. 621,999, dated. March28, 1899.

Application filed April 18,1898. .Serial No- 678,003. (No model.)

T0 aZZ whom it may-concern:

- Be it known that I, ROBERT BENTON GIBBS, a subject of the Queen ofGreat Britain, residing at Liverpool, in'the county of Lancaster,England, have invented certain-new and useful Improvements inI-Iot-Water-Oirculating Apparatus, of which the following is aspecification.

In hot-water-circulating apparatus for heatin g purposes, in which thereis a pipe or pipes for conveying the hot water from the boiler to thevarious parts of the building that require heating and which isamplified into coils'at special points, it has been usual to providesuch apparatus with an expansionc-hamber, in which the water can expandas it becomes heated, or with an open cistern in which the water risesor falls. The use of this expansion-chamber is inconvenient in manycases, because, besides being an unsightly object, it is oftendifficultto find suitable space to fix it in, and the defect of an open cisternis that it is liable to boil over and so flood the building.

Now the object of my present invention is to provide ahermetically-closed hot-water heating or circulating system, in whichthe usual expansion-chamber of the open tank can be entirely dispensedwith.

The invention will be understood from the following description,reference being had to the accompanying drawing, which shows a generalview of the apparatus.

Referring to the drawing, I provide an ascending pipe A, leading fromthe boiler B to radiators O, which are located at suitable points in thebuilding such as, for example, on the various stories-'-and descendingpipes D, by which the water again reaches the furnace, the whole circuitbeing hermetically sealed or closed. These radiators, which are closedvessels, may be of any suitable construction, so as to provide a largeheat-radiating surface, and they form part of the hotwater circuit,deriving their heat by the hotwater pipes aforesaid from the boiler B.One or more of these radiators*namely, the ones at the highestelevationare used to take the place of an expansion-chamber, suchradiator or radiators being only partly filled with water, so as toleave the upper portion empty for the water to expand in as it becomesheated. For this purpose I arrange in proximity to those radiators,whichare used as sub- .stitutes for an expansion-chamber, a standpipe E,which is cut short of the full height of the said radiators. The effectof pouring water into the stand-pipe will be to fill the cir=culating-pipes and all the radiators, with the exception of those at thehighest elevation, completely full of water. Those, however, at thehighest elevation will only be partly filled to a certain level, becausethe standpipe, being cut short of the full height of the radiators,prevents the latter being filled higher than the top of the stand-pipe.This insures the said radiators not being filled to the top, the area ofthe empty space for the expansion being proportioned to the length ofthe circuit and the number of radiators therein. Instead of astand-pipe, however, a

I metal or other bend may be screwed into the side of theexpansion-radiator ata certain dis tance short of the top, through whichwater can be fed into the circuit. Means areprovided, such as a cap orcook, for closing the mouth of the bend or stand-pipe, so that theentire circuit may be a hermetically-closed one.

A relief-valve F or other device may be pro vided in the upper part ofthe expansion radiator or any part of the system, if so desired, so asto provide against the accumula tion of dangerous pressure; but such isnot necessary if the apparatus is properly proportioned.

A convenient form of radiator is that in which there is a series ofsections or chambers joined together top and bottom and through whichthe hot water follows a winding path in such manner as to provide alarge heat-' radiating surface.

I declare that what I claim is-- 1. In a hot-water-circulatingapparatus, th combination of a water-heating device; a radiator; pipesconnecting the same into a single closed circuit; and a closable orificeplaced in the circuit and having its mouth a little below the highestpoint of the radiator, whereby the upper part of the radiator cannot befilled but acts as an expansion-chamber.

2. The combination of the boiler B; ascending pipe A; radiatorsC;descending pipes D, my name, this 7th day of April, 1898, in the theWhole forininga closed circuit; and standpresence of two subscribingwitnesses.

pipe E Openin into the circuit and havin its Y 1 mouth a little belowthe top of the highest ROBERF RENION GIRLS 5 radiator, substantially asand for the pur- Witnesses:

poses described. G. G. DYMOND,

In witness whereof I have hereunto signed II. P. SHOOBRIDGE.

